Radial drill



May 12,1931. L N. B.`cHAc|-: 1,804,673

RADIAL DRILL Filed Oct. 14 1925 2 Sheets-Sheet -1 /'rman Qhace,

fitto: nu.

May 12, 1931. N, B, CHACE 1,804,673

RADIAL DRILL Filed OGt. 14. 1925 2 Sheets-Sheet 2 4 5 l I gfx/vento@ /vrmanfx Qhace,

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Patented May 12, 1931` Unirse STATES NORMAN 1B. CHACE, I CINCINNATI, OHIO l RADIAL DRILL Application led Octoberlll, 1925. Serial No. 62,486;

`An object of my invention is to provide power driven means for feeding a carriage of radial drills and the like'longitudinally of the armof the' drill. n p Y Another object of my` invention is Ato provide a device for the purpose stated wherem the operator will atall times have ready access to the means controlling. movement of the spindle carriage. f

Another object of my invention is to pro'- vide a device for the purpose 'stated wherein the operator may selectively employ manual or power actuated means for moving Vthe' spindle carriage.l j f Another object of my invention is to provide a simple and `eflicient device for the purposes stated.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which Figure l is a view in elevation, showing a radial drill to whichisf applied a device embodying my invention.

Figure 2 is a sectional plan view of the hand feed mechanism, parts being broken away, and constituting details of my invention. I f

Figure 3 is a fragmental sectionalview showing the friction means and power transmission,members forming details of my invention. Y I

Figure 4 is a fragmental sectional view showing the mounting of a hand lever forniing aV detail of my invention.

The column 10 may be of any suitable construction and is provided v'ith .the customary vertical drive `shafts 11- and 12. Mounted upon the column is the customary arm 13, carrying a horizontal shaft 14, that vis driven from theshaft 12 by suitable bevel gears 15and 1 6. The horizontal shaft'14 is provided with suitable means whereby power and motion may be transmitted therefrom to the spindle 17, carried by the carriage 18. The carriage 18 is a slidably mounted upon vertically spaced `ways or rails 19 `and 20.

Means are provided for moving the carriage 18 longitudinally of the rails 19 and 20, by poweroerived from the shaft 14.

Thesemeans comprise friction members disposed within the housing'21 for driving a screw. 22 carried by the arm and extending insubstantial parallelism with the ways. The structure kwithin the housing 21 is dis- 55 closed in Figure 3. The shaft 14 is'provided at the outer ends of the arm` and said shaft with an axial bore. in which bore is received a rod 220. Theshaft 14 is provided with a radial elon '60 gated aperture 23,!eommunicating with the axial bore 24, and a A'pinf25eXtends through the opening 23, through the rod 220, andL secures; a friction pulley 26 to the rod 220 and the shaft 14 in such manner that the pulley must revolve with .the shaft 14 and the rod 220. The pulley may be actuated longitudinally of the shaft 14 by means of rod 220. The friction pulley is provided with conical faces 27 and 28, adapted for selective engagement upon complementary internal conical faces 29 and 30 respectively lformedy on gears 31 and 32 respectively.

From the foregoing'explanation it will be evident thatthe conical surfaces constitute a pair of friction clutches for selective transmission of power from shaft 14 to the gears 31and 32. The gear 32 drives idler gears 33 and 34, carried by suitable stud shafts mounted onhousing, the gear 34 engaging Vgear 35 mounted on the end of the screw shaft 22. The gear 31 engages idler gear SSG-carried by a suitable stud shaft-mounted on the housing and engaging the gear From the foregoing it will be evident that if one of the gears 31`or 32 is in frictional driving engagement with the cone clutch or friction member 26, the other of said gears will revolve freely. about the shaft `14. To accomplish this free rotation of the loose gear 31 or 32, as the case may be, there are provided suitable bearings or bushings as disclosed Yin Figure 3. f f

Transmission of power from shaft 14 to screw shaft 22, iscontrolled from a rod 37, extending longitudinally of the arm 13. The shaft 37 is provided at its outer end 38 with a cam 3 9, provided with an elongated recess 40. Therecess 4() is spirally disposed at the outer faceof the cam 39, and receives carriage 18, there is provided a handjlever 45. Any suitable arrangement or structure may be provided for causing the' hand lever.

'to more longitudinally of the rod 37, in accordance wit-li the i'eciproca'tion of 'thecarriage' longitudinally of lthe rails 19 Vand 20. 'lhe hand lever 45"'is splined tothe Yrod y37. Itl tdesired, the hand` lever need not i Amove with the carriage 18-"this is a 'inatterof choice. Y Y Y "From the foregoing, it will jbe readily evident that manipulation Vof the hand vlever 45 will serve" to"actuate"the lever 42, through the agency ofthe cam 3 9, land 'the elongatedV slot Av40 providedv therein, "whereby to engage and ldisengage `the cone =double lclutch member 26. It will be" evident that'upon release ofthe lever 45,' the tendency of the force Vdirected throughV `the double cone clutch' member 26, wouldbe Ato return 'the parts to their` neutral' or inoperative' iposition. order to preclude'accidental'inovement Vof the-parts from their inoperative positions, :thereis provided a radial aperture 46,-in "which is reciprocally receii ai' a ball 47. A'spring 48bearing upon the "b'a'll`47, yieldingly 'retainsV the ball in' a 'pocket .49, provided inthe rod 2 2, at such position 'that the pocket 49, registers with the aperturee, vwhen' the 'parts' are `in their inoperatii-.fepositions. A suitable' plug 50, preciudes Vescape ofthe spring 48. ""As shown herein, the spring 48 is 'partly received within a bore in the 'collar 51,1 and 'which bore registers withy the radial'aperture 4G. The coilar is looked' against movement independent of 4the shaft 1 4 by asuitable set s r'ew Rotation ofthe screw Shar. 22'is employed for effecting movement of the carriage 18, longitudinally of the rails 19, and 20. The carriage 18, has mounted upon` it a hand wheel, (see Figf2). The hand wheel is mounted 'upon shaft 54, provided at its rear 'end with a skew/or spiral gear 55, and engaging a helical gear v:56. 'The gear-15G is formed at one'end of the sleeve 57, receiving shaft 55, and to which shaft the sleeve 57 is keyed. Apwormwheel or helical 59, is pinned to Shaft'BS, and engages "the threads upon screw lshaft 22. Y:The 'relation of the elements vjust described are vsuch thatrotaltion vof the screw shaft 22, when power actuated, fromfithe shaft 14, willY not revolve the handY wheel oo, wherefore it 'follows that the carriage must move longitudinally of the screw shaft 22. Vhen the screw shaft 22 1s stationary, rotation of the hand wheel serves to move the cartridue loiwitudinallv of the D C) .l

vertical column,A a horizontal arm mounted 'on the'column, ways on the arm extending horizontally and longitudinally of the arm, a spindle carriage mounted slidably upon the wa-ys,a revoluble spindle on the carriage, a power shaft extending longitudinally of the arm for transmitting motion to the spindle associated with the carriage, a screw shaft extendir'ig longitudinally of the arm, reversiblel means for transmitting rotary motion from the lpower shaft to the screw shaft, a rod extending longitudinally of the arm, al connection between the rodand the reversible means' for controlling transmission of power from the power shaft yto the screw shaft,'a hand Wheel on the carriage and a connection between the'hand'wheel` and the screw shaft whereby rota-tory motion of the screw shaft l'will lmovefthe carriage longitudinally of the ways, 'andfwheleby manual rotation of `the-hand wheel, while the screw shaft is Stationary, likewise serves to actuate the carriage longitudinally of the ways.

2.` Inl a radial ldrill the combination Aofrv a vertical column', ahorizontal arm carried by the column `and provided withrhoriz'ontal ways extending f longitudinally thereof, a revoluble power shaft, a' revoluble screw shaft, and an `oscillating 'rod'mounted i on the arm and extended@'longitudinally thereof, va

'spindle carriage yrecirn'ocally mounted on .the ways, a spindle supported bythe carriage, 4the I spindle being l'adapted-'fato be lrevolubly actuated ifrom't-he ipower shaft,tlie arm having-a free end, atwhi'ch free end 'the 'power shaft, the screw shaft and thev rodareprovided with bearings, fthe vpower shaft Abeing Vprovided at the free lend off'the armvwith an axial bore and with anl elongated 'radial aperture, a 'rod extendingintothe bore fin the power shaft, a clutch 'member -extend- -ing about 'thepower-shafu'ia pin extend- 'ing :through the elongated 'radial aperture in Y the power shaft, and connecting the clutch member with the rod whereby the elutch'fmember, power shaft, and rod V`may revolve as a lunit, and' the clutch member-be 1reciprocated longitudinal- 'ly of' the power shaft,'vtlie 4clutch l member being provided with opposedconical faces,l

a pair of' gears revolubly' mounted Vmithe Y power shaft, each of the gearsprovided'with a conical Vfriction 'surface complementary to the conical lsurfaces provided on the clutch imo member, whereby the clutchY member inay'lao Cal selectively drive the gears, gearing connecting the pair of gears with the screw shaft, a pivotally mounted lever revolubly receiving at its one end the rod extending from the power shaft, a cam carried by the rod eX- tending longitudinally of the arm and engaging the lever for actuating the lever about its pivotal mounting and thereby reciprocating the rod associated with the power shaft, means for oscillating the cam and the rod associated therewith, a hand wheel revolubly mounted on the carriage and a worm wheel associated therewith and engaging the screw shaft.

3. The combination with a rail and a carriage reciprocally mounted on the rail, of a screwextending in parallelism with the rail, a worm gear mounted on the carriage engaging the screw, a gear associated with the worm gear formovement therewith, a skew gear mounted on the carriage and engaging the gear, means for revolubly actuating the skew gear, a power shaft,'a clutch mechanism having ay member for movement with the power shaft, and a complementary member for engagement with said first mentioned clutch member, gearing connecting the second mentioned clutch member and the screw, arlever slidably mounted on the arm and connected with the carriage for movement with the carriage and a connection between the lever and the clutch for engaging and dis-engaging the clutch member.

4. In a radial drill the combination of a column, a horizontal arm supported by the column, a power shaft and a screw shaft eX- c tending longitudinally of the arm, reversible means for driving the screw shaft from the power shaft, acarriage reciprocally mounted on the arm, a worm wheel onthe carriage and engaging the screw for converting rotatory motion of the screw into movement yof the carriage longitudinally of the arm, a manually operable means on the carriage,'gearing associated with the worm wheel and the manuallyoperable means for transmitting motion of the manually operable means to the worm wheel, said gearingvbeing incapable of transmitting motion of the worm Wheel to the manually operable means, and means for controlling transmission of power from the power shaft through the reversible power transmitting means to the screw shaft.

5. A machine having in combination a supporting rail, a power means, a screw shaft extending longitudinally of the rail, reversible means for driving the screw shaft from the power means, a carriage reciprocally mounted on the rail, a worm wheel on the carriage and engaging the screw for converting rotatory motion vof the screw into movement of the carriage longitudinally of the rail, a manually operable means on the carriage, gearing associated with the ber, 1925.

worm wheel and the manually operable means for transmitting motion of the manually operable means to the vworm wheel,

NORMAN B. oHAoE.

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